Mr. Keita Katayama Profile

Keita Katayama

at Kyushu Univ

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Author

Publications (6)

Proceedings Article | 13 March 2024 Presentation

Effect of ring-shaped beam on microparticle fabrication and laser welding

Daisuke Nakamura, Kazutaka Horinouchi, Masahiro Koba, Ippei Watanabe, Toshifumi Kikuchi, Keita Katayama, Mitsuhiro Higashihata, Hiroshi Ikenoue

Proceedings Volume PC12872, PC128720I (2024) https://doi.org/10.1117/12.3009651

KEYWORDS: Laser welding, Fabrication, Laser ablation, Semiconductors, Semiconductor lasers, Ring lasers, Pulsed laser operation, Particles, Metals, Laser processing

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Proceedings Article | 12 March 2024 Presentation + Paper

Joint quality assessment by machine learning using characterized surface thermal radiation images of laser welding process

T. Kikuchi, R. Takabatake, K. Katayama, H. Ikenoue, D. Nakamura

Proceedings Volume 12878, 128780E (2024) https://doi.org/10.1117/12.3000891

KEYWORDS: Machine learning, Laser welding, Imaging spectroscopy, Spectroscopy, Laser radiation, Laser processing, Laser irradiation, Image processing

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Proceedings Article | 17 March 2023 Poster + Paper

Nanosecond time-resolved two-dimensional temperature estimation of nanosecond laser-irradiated silicon

R. Koike, T. Kikuchi, K. Katayama, Y. Kakimoto, D. Nakamura, H. Ikenoue

Proceedings Volume 12408, 124080J (2023) https://doi.org/10.1117/12.2648631

KEYWORDS: Laser irradiation, Temperature metrology, Silicon, Pulsed laser operation, Temperature distribution, Laser processing, Laser radiation, Excimer lasers, Cameras, Solids

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Proceedings Article | 17 March 2023 Poster + Paper

Excimer laser doping for the fabrication of 4H-SiC power devices

Yoshiaki Kakimoto, Keita Katayama, Takuma Yasunami, Tetsuya Goto, Daisuke Nakamura, Hiroshi Ikenoue

Proceedings Volume 12408, 124080M (2023) https://doi.org/10.1117/12.2651419

KEYWORDS: Silicon carbide, Laser irradiation, Doping, Resistance, Nitrogen, Excimer lasers, Diffusion, Surface roughness, Fabrication, Silicon

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Proceedings Article | 20 April 2021 Poster + Presentation + Paper

Fabrication of nanoparticles of oxide materials by UV pulsed laser ablation in gas phase

Rio Suzuki, Reiji Koike, Keita Katayama, Mitsuhiro Higashihata, Hiroshi Ikenoue, Daisuke Nakamura

Proceedings Volume 11674, 116741G (2021) https://doi.org/10.1117/12.2576843

KEYWORDS: Nanoparticles, Laser ablation, Ultraviolet radiation, Oxides, Nanolithography, Gas lasers, Zinc oxide, Optoelectronics, Nanocrystals, Visualization

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Proceedings Article | 5 March 2021 Presentation + Paper

Estimation of the mobility of low temperature polycrystalline silicon thin film transistors through deep learning

Akira Mizutani, Fuminobu Hamano, Keita Katayama, Daisuke Nakamura, Tetsuya Goto, Hiroshi Ikenoue

Proceedings Volume 11673, 1167306 (2021) https://doi.org/10.1117/12.2579492

KEYWORDS: Transistors, Silicon films, Annealing, Silicon, Optical microscopes, Image quality, Excimer lasers, Crystals, Amorphous silicon, Thin films

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Showing 5 of 6 publications

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